Greg Heffley is not willing to be the odd man out. A dance at Greg's middle school has everyone scrambling to find a partner, and Greg is determined not to be left by the wayside. So he concocts a desperate plan to find someone-anyone!-to go with on the big night. But Greg's schemes go hilariously awry, and his only option is to attend the dance with his best friend, Rowley Jefferson, and a female classmate as a "group of friends". But the night is long, and anything can happen along the way.